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Align T-REX Electric Series
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T-REX 450
T-Rex 450 build
Jingles

Heliman

Tokyo

With my T-Rex 450 build imminent, I'm wondering if folks have any tips that I can take into the build process.

I've heard lots about the use (or otherwise) of the R48 liquid, the amount of tightening that should be applied to certain screws in certain locations, which oils should be used, etc., etc. but it would be useful to have all of the tips in one place and referenced to the manual and specific T-Rex 450 model.

For example;

T-Rex 450 SE V2: Page 11 (HT5), Do not over-tighten collar screws on tail rotor holder.

It's just an idea, but it would be useful for those who are new to heli-building and would be a valuable resource.

Jingles.

02-21-2012 07:47 AM
Richardmid1

rrProfessor

Leeds, England

I don't think you can go far wrong building a Trex 450, everything you need to know is in the manual.

Which Trex 450 will you be building?

60% of the time, it works every time!

02-21-2012 10:33 AM
HOMEPAGE  
Jingles

Heliman

Tokyo

T-REX 450 Sport V2 Super Combo.

There are a lot of tips out there, but a single spot for all of the best info would be a gold mine.

Jingles.

02-21-2012 12:05 PM
Richardmid1

rrProfessor

Leeds, England

Ive just built one of those myself. Only tips I can think of thats needed is to grind a small flat in the motor shaft where the grub screw for the pinion is going to sit. I use a dremel with a cutting wheel in. Also take note of the small slots in the frame to align the servos at 90 degrees to the main shaft, although this is in the manual.

How new are you to electric heli building?

If you are just in the learning stage maybe some forward flight and circuits ide suggest getting a smaller pinion as the stock 15T gives insane headspeeds for hard 3D and is just going to reduce your flight time. The older 450 Sport came with a 14T pinion which would be better but a 13T would be even better if you can find one (remember the motor shaft is 3.5mm not the usual 3.17mm).

Another tip is not to use the governor as it isn't very good. Best is to use flat throttle curves even for normal mode just remember the first point needs to be 0! E.g. normal 0-70-70-70-70, idle up 1, 80-80-80-80-80, idle up 2, 90-90-90-90-90.

Just thought of another. The main blade grip mixing arms can be turned upside down (Align logo facing down) to give a more stable more sedate flying heli, don't know why this isn't mentioned in the manual!

60% of the time, it works every time!

02-21-2012 01:21 PM
HOMEPAGE  
Jingles

Heliman

Tokyo

I'm very new to heli-building... RC cars are no problem but this is something new. I do like to get as much info before heading into a new project, hence this thread.

Am I going for a straight gear pinion or a helical gear pinion?

I could get Slant Thread Main Drive Gear 121T H45156 and Motor Pinion Helical Gear 12T H45157 or Motor Pinion Helical Gear 12T H45159...

Or the 450 Sport V1 Motor Pinion Gear 12T H45058 for the straight main gears...

As you can see... I have a lot of questions...

Jingles.

02-21-2012 02:43 PM
Richardmid1

rrProfessor

Leeds, England

You could upgrade the the slant cut main gear and pinion, the only advantage is its a bit quieter and can take a bit more power and may possibly survive a crash although I doubt it. However the slant cut main gear and pinion gives the same gear ratio as the stock straight gears. I would start with the 14T pinion from the Sport V1.

The setup on a heli is far more crutial than on an RC car so forget what you have learned on RC cars!

If you haven't already seen them watch as many of finless bob's videos as you can, be warned there are alot!

Start here: http://www.helifreak.com/showthread.php?t=41692

60% of the time, it works every time!

02-21-2012 03:03 PM
HOMEPAGE  
Jingles

Heliman

Tokyo

"The setup on a heli is far more crutial than on an RC car so forget what you have learned on RC cars!"

I'd rather not. There's much to be learned from different types of RC.

Jingles.

02-22-2012 04:24 AM
Jingles

Heliman

Tokyo

Well, I read in another thread that a higher head-speed will make for easier beginner flying, so I'm going to stick with the kit stock parts and build as per the instructions.

As was mentioned at the start of this thread, everything I need to know is in the manual... Or on Helifreak it seems...

Jingles.

02-23-2012 02:42 AM
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